Genetics and Heredity

What is the basic unit of inheritance?

• Cell

• DNA

• Gene

• Protein

True or false: dominant traits are always more common in a population.

• True

• False

What do we call different forms of the same gene?

• Traits

• Alleles

• Chromosomes

• Clones

Which of the following genotypes is heterozygous?

• AA

• aa

• Aa

• BB

What is the chance of obtaining a recessive phenotype when crossing two heterozygous parents (Aa x Aa)?

• 25%

• 50%

• 75%

• 100%

What structure carries genetic information?

• Ribosome

• Mitochondria

• Chromosome

• Cytoplasm

Which of the following is not genetically inherited?

• Eye color

• Blood type

• The language you speak

• Hair texture

A segment of DNA that encodes a protein is called:

• Chromosome

• Gene

• Allele

• Nucleotide

If 'T' is a dominant allele and 't' is a recessive allele, what is the phenotype of the organism 'Tt'?

• Recessive

• Dominant

• Mixed

• Unknown

Which of the following best describes a genotype

• The physical appearance

• The protein structure

• The genetic makeup

• The environment effects